CN113494846A - Directly-heated drying equipment - Google Patents
Directly-heated drying equipment Download PDFInfo
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- CN113494846A CN113494846A CN202110880645.9A CN202110880645A CN113494846A CN 113494846 A CN113494846 A CN 113494846A CN 202110880645 A CN202110880645 A CN 202110880645A CN 113494846 A CN113494846 A CN 113494846A
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- heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to the technical field of drying and discloses a directly-heated drying device. The directly-heated drying equipment comprises a machine shell, a heat recovery heat exchanger and a heat pump unit, a return air inlet and an air supply outlet are respectively communicated with a box to be dried, the heat pump unit is arranged in the machine shell and comprises a condenser communicated with each other through a refrigerant pipeline, an evaporator and a compressor, the heat recovery heat exchanger is arranged in the machine shell, a heat absorption channel and a heat supply channel which exchange heat mutually are arranged in the heat recovery heat exchanger, a fresh air inlet is communicated with an inlet of the heat absorption channel, an outlet of the heat absorption channel is communicated with the air supply outlet, the condenser is arranged at the air supply outlet, the return air inlet is communicated with an inlet of the heat supply channel, an outlet of the heat supply channel is respectively communicated with an air outlet and an inlet of the heat absorption channel, the evaporator is arranged at an outlet of the heat supply channel, and the evaporator and the heat absorption channel are communicated through an on-off air valve. The directly-heated drying equipment has multiple operation modes, can adapt to environmental changes, realizes heat recovery and has higher energy efficiency.
Description
Technical Field
The invention relates to the technical field of drying, in particular to a directly-heated drying device.
Background
The conventional heat pump drying device is generally fixed in structure and can only operate in a circulation mode, but outdoor environmental conditions change all the year round, a fixed circulation flow is difficult to adapt to environmental changes, and the energy-saving potential of a heat pump cannot be fully exerted. For example, most conventional direct-heating type drying units mostly adopt a fresh air system, fresh air is heated by a condenser, then passes through materials to be dried, the materials absorb heat, moisture is evaporated, the fresh air is changed into high-humidity gas, and finally the high-humidity gas is directly discharged. Above-mentioned drying method has great drawback, and the direct moist air who arranges outward contains more heat, and direct emission has resulted in the waste of energy, and this kind of mode has caused the limitation of directly-heated formula drying unit moreover, and under the low ring temperature condition, the heating capacity is not enough, and drying efficiency is low.
Disclosure of Invention
Based on the above, the invention aims to provide a directly-heated drying device, which has multiple operation modes, can adapt to environmental changes, realizes heat recovery, and has high energy efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a direct heating type drying apparatus comprising:
the drying machine comprises a machine shell, wherein a fresh air inlet, a return air inlet, an air outlet and an air supply outlet are formed in the machine shell, the return air inlet and the air supply outlet are respectively communicated with a box to be dried, a fresh air valve is arranged at the fresh air inlet, and an air exhaust valve is arranged at the air outlet;
the heat pump unit is arranged in the shell and comprises a condenser, an evaporator and a compressor which are communicated through a refrigerant pipeline;
the heat recovery heat exchanger is arranged in the shell, a heat absorption channel and a heat supply channel which exchange heat mutually are arranged in the heat recovery heat exchanger, the fresh air inlet is communicated with the inlet of the heat absorption channel, the outlet of the heat absorption channel is communicated with the air supply outlet, the condenser is arranged at the air supply outlet, the return air inlet is communicated with the inlet of the heat supply channel, the outlet of the heat supply channel is respectively communicated with the air outlet and the inlet of the heat absorption channel, the evaporator is arranged at the outlet of the heat supply channel, and the evaporator is communicated with the heat absorption channel through an on-off air valve;
when the fresh air valve and the exhaust air valve are opened and the on-off air valve is closed, return air and fresh air respectively enter a heat supply channel and a heat absorption channel of the heat recovery heat exchanger for heat exchange, the return air after heat exchange is discharged after heat dissipation of the evaporator, and the fresh air after heat exchange enters the drying box after temperature rise of the condenser;
when the on-off air valve is opened and the fresh air valve and the exhaust air valve are closed, return air sequentially flows through a heat supply channel of the heat recovery heat exchanger, the evaporator and a heat absorption channel of the heat recovery heat exchanger, is heated by the condenser and then enters the drying box;
when the fresh air valve, the exhaust air valve and the on-off air valve are opened, return air and fresh air respectively enter a heat supply channel and a heat absorption channel of the heat recovery heat exchanger for heat exchange, the heat-exchanged return air is partially discharged after being radiated by the evaporator, the other part of the heat-exchanged return air enters the heat absorption channel of the heat recovery heat exchanger, and the heat-exchanged return air and the fresh air absorb heat together, then are heated by the condenser and enter the drying box. As a preferable scheme of the direct heating type drying equipment, the direct heating type drying equipment further comprises:
and the fresh air valve, the exhaust air valve and the on-off air valve are all connected with the controller.
As a preferable scheme of the direct heating type drying equipment, the direct heating type drying equipment further comprises:
the temperature sensor is arranged at the air supply port and connected with the controller, a temperature threshold value is arranged in the controller, when a temperature signal transmitted by the temperature sensor is higher than the temperature threshold value, the controller controls the fresh air valve and the exhaust air valve to be opened, and the on-off air valve is closed, otherwise, the controller controls the on-off air valve to be opened, and the fresh air valve and the exhaust air valve to be closed.
As a preferable scheme of the direct heating type drying equipment, the direct heating type drying equipment further comprises:
and the exhaust fan is arranged between the exhaust outlet and the evaporator.
The invention has the beneficial effects that:
the invention provides a directly-heated drying device, wherein a compressor, a condenser and an evaporator in a casing are communicated through refrigerant pipelines, air coming out from an outlet of a heat absorption channel of a heat recovery heat exchanger is heated by the condenser and enters a box to be dried through an air supply outlet of the casing to dry materials, high-humidity return air discharged from the box to be dried enters the casing through a return air inlet on the casing, and a fresh air valve, an exhaust air valve or an on-off air valve is selectively opened according to actual requirements. When only a fresh air valve and an exhaust air valve are opened, the mode is switched to a first mode, high-temperature and high-humidity return air enters a heat supply channel of a heat recovery heat exchanger, the fresh air enters a heat absorption channel of the heat recovery heat exchanger, absorbs heat in the return air to heat up, then enters a box to be dried after being heated up again by a condenser, and is dried in the box to be dried, in the process, the heat in the return air is subjected to primary heat recovery, the heated return air is condensed by an evaporator to release heat, a refrigerant in the evaporator absorbs residual heat in the return air, and the return air subjected to secondary heat recovery is finally discharged through an air outlet; when only the on-off air valve is opened, the mode is switched to a second mode, return air passes through a heat supply channel of the heat recovery heat exchanger, is condensed and released by an evaporator, is reduced in temperature, then enters a heat absorption channel of heat recovery heat exchange through the on-off air valve, absorbs heat of the return air in the heat supply channel, is heated by a condenser, and finally enters a box to be dried to dry materials, in the process, the return air enters the heat supply channel for precooling, so that the dew point of the return air is reduced, is condensed and released by the evaporator to realize dehumidification, and meanwhile, secondary heat recovery of the return air is realized; when a fresh air valve, an exhaust air valve and an on-off air valve are simultaneously opened, the mode is switched to a third mode, return air passes through a heat supply channel of the heat recovery heat exchanger, is condensed by an evaporator to release heat, the temperature is reduced, then part of the return air is discharged through the exhaust air valve, the other part of the return air passes through the on-off air valve and enters a heat absorption channel of the heat recovery heat exchanger together with the fresh air entering through the fresh air valve, the heat of the return air in the heat supply channel is absorbed for heating, and finally the return air enters the box to be dried after being heated by a condenser, and the flow ratio of the fresh air to the return air can be adjusted according to the fresh air volume entering from a fresh air inlet and the exhaust air volume discharged from an exhaust outlet. Under the structure, the directly-heated drying equipment can realize the switching of three modes, can reasonably dehumidify and recover heat of return air according to requirements, improves the capacity and energy efficiency of the drying equipment and enables the drying equipment to stably operate at any ambient temperature.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic diagram of a direct heating type drying apparatus according to an embodiment of the present invention in a first mode;
fig. 2 is a schematic diagram of a direct-heating drying apparatus according to an embodiment of the present invention in a second mode;
fig. 3 is a schematic diagram of a direct heating type drying apparatus in a third mode according to an embodiment of the present invention.
In the figure:
1. a housing; 2. a box to be dried;
3. a heat pump unit; 31. a condenser; 32. an evaporator; 33. a compressor; 34. a gas-liquid separator; 35. a throttling device;
4. a heat recovery heat exchanger; 5. an air valve is switched on and off; 6. a fresh air valve; 7. an air exhaust valve; 8. an exhaust fan; 9. and a condensing fan.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1 to 3, the present embodiment provides a direct-heating drying apparatus, which is communicated with a box to be dried 2 and is used for inputting drying air into the box to be dried 2 to dry materials. The directly-heated drying equipment comprises a casing 1 and a heat recovery heat exchanger 4, wherein a fresh air inlet, a return air inlet, an air outlet and an air supply outlet are arranged on the casing 1, the return air inlet and the air supply outlet are respectively communicated with a box to be dried 2, a fresh air valve 6 is arranged at the fresh air inlet, and an air exhaust valve 7 is arranged at the air outlet; the heat recovery heat exchanger 4 is arranged in the machine shell 1, a heat absorption channel and a heat supply channel which exchange heat mutually are arranged in the heat recovery heat exchanger 4, a fresh air inlet is communicated with an inlet of the heat absorption channel, a return air inlet is communicated with an inlet of the heat supply channel, an outlet of the heat absorption channel is communicated with an air supply outlet, a condenser 31 is arranged at the air supply outlet, an outlet of the heat supply channel is communicated with an air outlet and an inlet of the heat absorption channel respectively, an evaporator 32 is arranged at an outlet of the heat supply channel, and an on-off air valve 5 is arranged between the evaporator 32 and the heat absorption channel. The casing 1 is further provided with a compressor 33, and the compressor 33, the condenser 31 and the evaporator 32 are communicated through refrigerant pipelines to form the heat pump unit 3.
Preferably, the fresh air valve 6, the exhaust air valve 7 and the on-off air valve 5 are all electric air valves and are all connected with the controller, and the controller controls the start, stop and opening of the fresh air valve 6, the exhaust air valve 7 and the on-off air valve 5, so that the operation mode and the return air heat recovery quantity of the directly-heated drying equipment are controlled. In this embodiment, the controller may be a centralized or distributed controller, for example, the controller may be an individual single chip microcomputer or may be formed by a plurality of distributed single chip microcomputers, and a control program may be run in the single chip microcomputer to control the start, stop, and opening of the fresh air damper 6, the exhaust air damper 7, and the on-off air damper 5.
The directly-heated drying equipment provided by the embodiment can selectively open or close the fresh air valve 6, the exhaust air valve 7 or the on-off air valve 5 according to actual requirements, and select the opening degree of the fresh air valve 6, the exhaust air valve 7 or the on-off air valve 5. As shown in fig. 1, when only the fresh air valve 6 and the exhaust air valve 7 are opened, the mode is switched to a first mode, the high-temperature high-humidity return air enters the heat supply channel of the heat recovery heat exchanger 4, the fresh air enters the heat absorption channel of the heat recovery heat exchanger 4, the fresh air absorbs heat in the return air to heat up, then the heat rises again through the condenser 31 and enters the box to be dried 2 to dry materials, in the process, the heat in the return air is subjected to primary heat recovery, the heated return air is condensed through the evaporator 32 to release heat, a refrigerant in the evaporator 32 absorbs residual heat in the return air, the return air subjected to secondary heat recovery is finally discharged through the air outlet, secondary heat recovery and utilization of the return air are realized in the first mode, and meanwhile, the air supply temperature of the air supply outlet is ensured. As shown in fig. 2, when only opening on-off air valve 5, switch to the second mode, the return air passes through the heat supply channel of heat recovery heat exchanger 4, heat is released through the condensation of evaporator 32, the temperature is reduced, then enter the heat absorption channel of heat recovery heat exchanger 4 through on-off air valve 5, and absorb the heat of the return air in the heat supply channel and heat up, finally, heat up through condenser 31 and then enter the box 2 to be dried for drying, in this process, the return air enters the heat supply channel for precooling, make the return air dew point reduce, release heat through the condensation of evaporator 32 and realize dehumidification, the second grade heat recovery of the return air has been realized simultaneously. As shown in fig. 3, when the fresh air valve 6, the exhaust air valve 7 and the on-off air valve 5 are simultaneously opened, the mode is switched to the third mode, return air passes through the heat supply channel of the heat recovery heat exchanger 4, is condensed and released by the evaporator 32, the temperature is reduced, then part of the return air is discharged through the exhaust air valve 7, the other part of the return air passes through the on-off air valve 5 and enters the heat absorption channel of the heat recovery heat exchanger 4 together with fresh air entering through the fresh air valve 6, the heat of the return air in the heat supply channel is absorbed for temperature rise, finally the return air enters the box to be dried 2 for drying materials after being heated by the condenser 31, and the quantity of the fresh air and the return air entering the heat absorption channel is controlled by controlling the opening degree of the exhaust air valve 7 and the opening degree of the fresh air valve 6. Under the structure, the directly-heated drying equipment can realize the switching of three modes, can reasonably dehumidify and recover heat of return air according to requirements, improves the capacity and energy efficiency of the drying equipment and enables the drying equipment to stably operate at any ambient temperature.
Preferably, the return air inlet is communicated with the top of the box to be dried 2, so that the high-humidity return air in the box to be dried 2 can be recovered.
Preferably, the heat recovery heat exchanger 4 is a sensible heat exchanger, so that the air in the heat supply channel and the heat absorption channel only exchanges heat, does not exchange humidity, avoids entering the to-be-dried box 2 to have a large drying humidity, influences the drying effect, and simultaneously avoids influencing the dehumidification effect and the heat recovery of return air.
Preferably, filters are arranged at the fresh air inlet and the return air inlet.
Specifically, a gas-liquid separator 34 is arranged in a refrigerant pipeline between the evaporator 32 and the compressor 33, so that damage to each movable interface of the compressor 33 caused by liquid refrigerant is avoided, and safe operation of the compressor 33 is ensured; a throttle device 35 is disposed in a refrigerant pipe between the condenser 31 and the evaporator 32, and the throttle device 35 may be an electronic expansion valve or a thermal expansion valve, for example. More specifically, an exhaust fan 8 is arranged between the evaporator 32 and the exhaust outlet, and the exhaust fan 8 exhausts return air which is subjected to secondary heat recovery of the evaporator 32 in a mixed mode from the exhaust outlet; a condensing fan 9 is arranged between the condenser 31 and the air supply outlet, and the condensing fan 9 supplies the drying air heated by the condenser 31 into the box to be dried 2. The refrigerant is compressed by the compressor 33, pressurized, heated, enters the condenser 31, heats the air coming out of the heat absorption channel of the heat recovery heat exchanger 4, the heated air is sent into the box to be dried 2 by the condensing fan 9, the refrigerant is condensed, cooled, then enters the evaporator 32 through the flow control of the throttling device 35 to absorb heat, evaporate and heat, and finally enters the compressor 33 after gas-liquid separation to be compressed, pressurized, heated and circulated for the next time.
Preferably, a water pan is disposed below the evaporator 32, and the air flowing out of the heat absorption channel of the heat recovery heat exchanger 4 passes through the evaporator 32 to exchange heat with the refrigerant in the evaporator 32, and partially forms condensed water, and the condensed water is collected in the water pan. More preferably, the water pan is communicated with the external environment through a pipeline, and condensed water in the water pan is discharged through the pipeline.
In order to realize that the directly-heated drying equipment can automatically switch the operation mode according to the ambient temperature, a temperature sensor is further arranged at the air supply port and connected with a controller, the controller can receive the temperature signal transmitted by the temperature sensor and control the start, stop and opening of the fresh air valve 6, the exhaust air valve 7 and the on-off air valve 5 according to the temperature signal. Illustratively, a temperature threshold is arranged in the controller, when the controller receives a temperature signal transmitted by the temperature sensor, the temperature signal is compared with the temperature threshold, and if the temperature signal transmitted by the temperature sensor is higher than the temperature threshold, the controller controls the fresh air valve 6 and the exhaust air valve 7 to be opened and the on-off air valve 5 to be closed, namely the directly-heated drying equipment is switched to the first mode; on the contrary, the controller controls the on-off air valve 5 to be opened, and simultaneously the fresh air valve 6 and the exhaust air valve 7 to be closed, namely the directly-heated drying equipment is switched to the second mode. Of course, in other embodiments, a plurality of temperature thresholds may be set in the controller, and the direct-heating type drying apparatus is controlled to switch among the three modes according to the temperature range in which the temperature signal is located.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (4)
1. A direct heating type drying apparatus, comprising:
the drying machine comprises a machine shell (1), wherein a fresh air inlet, a return air inlet, an air outlet and an air supply outlet are formed in the machine shell (1), the return air inlet and the air supply outlet are respectively communicated with a box (2) to be dried, a fresh air valve (6) is arranged at the fresh air inlet, and an air exhaust valve (7) is arranged at the air outlet;
the heat pump unit (3) is arranged in the shell, and the heat pump unit (3) comprises a condenser (31), an evaporator (32) and a compressor (33) which are communicated through a refrigerant pipeline;
the heat recovery heat exchanger (4) is arranged in the shell (1), a heat absorption channel and a heat supply channel which exchange heat mutually are arranged in the heat recovery heat exchanger (4), the fresh air inlet is communicated with the inlet of the heat absorption channel, the outlet of the heat absorption channel is communicated with the air supply outlet, the condenser (31) is arranged at the air supply outlet, the return air inlet is communicated with the inlet of the heat supply channel, the outlet of the heat supply channel is respectively communicated with the air outlet and the inlet of the heat absorption channel, the evaporator (32) is arranged at the outlet of the heat supply channel, and the evaporator (32) is communicated with the heat absorption channel through an air on-off valve (5);
when the fresh air valve (6) and the exhaust air valve (7) are opened and the on-off air valve (5) is closed, return air and fresh air respectively enter a heat supply channel and a heat absorption channel of the heat recovery heat exchanger (4) for heat exchange, the return air after heat exchange is discharged after heat dissipation of the evaporator (32), and the fresh air after heat exchange enters the drying box (2) after temperature rise of the fresh air through the condenser (31);
when the on-off air valve (5) is opened and the fresh air valve (6) and the exhaust air valve (7) are closed, return air sequentially flows through a heat supply channel of the heat recovery heat exchanger (4), the evaporator (32) and a heat absorption channel of the heat recovery heat exchanger (4), and then enters the drying box (2) after being heated by the condenser (31);
when the fresh air valve (6), the exhaust air valve (7) and the on-off air valve (5) are opened, return air and fresh air respectively enter a heat supply channel and a heat absorption channel of the heat recovery heat exchanger (4) for heat exchange, the return air after heat exchange is partially discharged after being radiated by the evaporator (32), and the other part of the return air enters the heat absorption channel of the heat recovery heat exchanger (4), absorbs heat together with the fresh air, is heated by the condenser (31), and enters the drying box (2).
2. The direct heating type drying apparatus according to claim 1, further comprising:
and the fresh air valve (6), the exhaust air valve (7) and the on-off air valve (5) are connected with the controller.
3. The direct heating type drying apparatus according to claim 2, further comprising:
the temperature sensor is arranged at the air supply port and connected with the controller, a temperature threshold value is arranged in the controller, when a temperature signal transmitted by the temperature sensor is higher than the temperature threshold value, the controller controls the fresh air valve (6) and the exhaust air valve (7) to be opened, and meanwhile, the on-off air valve (5) is closed, otherwise, the controller controls the on-off air valve (5) to be opened, and meanwhile, the fresh air valve (6) and the exhaust air valve (7) are closed.
4. The direct heating type drying apparatus according to claim 1, further comprising:
and the exhaust fan (8) is arranged between the exhaust outlet and the evaporator (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110880645.9A CN113494846A (en) | 2021-08-02 | 2021-08-02 | Directly-heated drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110880645.9A CN113494846A (en) | 2021-08-02 | 2021-08-02 | Directly-heated drying equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113494846A true CN113494846A (en) | 2021-10-12 |
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ID=77996876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110880645.9A Pending CN113494846A (en) | 2021-08-02 | 2021-08-02 | Directly-heated drying equipment |
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| CN (1) | CN113494846A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983807A (en) * | 2021-11-01 | 2022-01-28 | 深圳麦克维尔空调有限公司 | Drying machine |
| CN115574556A (en) * | 2022-09-30 | 2023-01-06 | 青岛海尔空调电子有限公司 | Drying system and control method for drying system |
| CN115597331A (en) * | 2022-10-24 | 2023-01-13 | 广东芬尼克兹环保科技有限公司（Cn） | High-temperature dryer and control method thereof |
-
2021
- 2021-08-02 CN CN202110880645.9A patent/CN113494846A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113983807A (en) * | 2021-11-01 | 2022-01-28 | 深圳麦克维尔空调有限公司 | Drying machine |
| CN115574556A (en) * | 2022-09-30 | 2023-01-06 | 青岛海尔空调电子有限公司 | Drying system and control method for drying system |
| CN115597331A (en) * | 2022-10-24 | 2023-01-13 | 广东芬尼克兹环保科技有限公司（Cn） | High-temperature dryer and control method thereof |
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